Just a couple of minor issues..
When they're talking to the sceptic guy in New York the backdrop shows it to be night time, when surely as they're several hours behind us in the US it would be daylight. I know, it wouldn't have had the same kind of affect.
Then when the youngest daughter is describing the time she saw Pipes behind the cupboard door, surely seeing something like that would terrify the life out of a young child? She didn't seem in the least bit phased.